Larson Davis 831C-FFT, Reference Manual

Page: 38 / 254

SoundAdvisor Model 831C SoundAdvisor 831C Display In SLM Mode 33
About the Big Digit Sound Page
The big digit display is best for observing the instantaneous sound level and monitoring
when the measured sound exceeds a defined trigger level.
FIGURE 4-2 Live Tab: Big Digit Display Page
1.
The current value on the Big Digit display
corresponds to the “Any Level” value you select. To
change this metric, highlight it, press
Enter
5
, and
select an option.
2.
The peak exceedance value displays in gray if it is
under range.
3.
Current date and time on the meter displays near
the bottom.
4.
This is the Exceedance Trigger level you selected
in the measurement setup.
About the Octave Band Analyzer Page
TAKE NOTE
This feature requires the 831C-OB3 firmware option.
Four pages on the Live tab relate to which octave band setting you choose in the
measurement setup. The height of each band in the graph is the amplitude of sound for
that frequency.
FIGURE 4-3 Live Tab: 1/1 Octave Band Page
1.
Each band is one full octave that increases
from left to right.
2.
Displays the frequency weighting and detector.
3.
Displays the frequency band level.
4.
Use the
left
and
right buttons
(
46
) to
highlight the desired band and the numerical
values below will reflect the information at that
octave.
5.
The purple band on the far right represents an
average sum of all the bands.
1.
2.
3.
4.
1.
2.
3.
4.
5.